Cement-tile machine.



W. E. & H. B. DUNN.

CEMENT TILE MACHINE. APPLICATION FILED MAR.16,191L

1, 106,086. Patented Aug. 4, 1914.

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THE NORRIS PETERS CO PHOTO-LITHQ, WASHINGTON, D. Cv

W. E. & H. E. DUNN.

CEMENT TILE MACHINE. APPLICATION mum MAE.16,1911.

1 ,106,086, Patented Aug. 4, 1914.

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WILLIAM E. DUNN AND HARRY E. DUNN, OF CHICAGO, ILLINOIS.

CEMENT-TILE MACHINE.

Specification of Letters Patent.

Patented Aug. 4, 1914..

Application filed March 16, 1911. Serial No. 614,770.

To all whom it may concern Be it known that we, IVILLIAM E. DUNN and Hana): E. DUNN, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Cement-Tile Machines, of which the following is a specification.

Our invention relates to cement machines and refers especially to apparatus for making pipes and hollow tiles.

The chief objects of the improvements which constitute the subject matter of this application for patent are :to provide a simple, compact and efficient machine for producing hollow cylindrical tiles from concrete; and to furnish an apparatus for the purpose stated having a casing designed to form a protective housing for the main gearing, thus increasing the durability of the machine by preventing access of grit to the bearings.

Further objects, stated in detail, refer to the means for adjusting theposition of the packing members, whereby the compression of the plastic material may be controlled, thus insuring the required density of the tile walls under varying conditions, and to the advantageous application of the forming head, which moves upward when operating, the rotary movement given thereto producing first a loosening of the material, followed by a compression through the action of the adjustable packing members,their effect being to smooth and trowel the inner surface of the formed pipe or tile, thus giving a proper finish to the interior thereof. As a result the formed tile will have a firm homogeneous wall, that will bear handling without danger of crumbling or breaking, and when properly cured in the usual manner, the finished product will be strong and durable and capable of resisting the action of frost.

The desired objects are obtained by employing the apparatus illustrated in the accompanying drawing which forms a part of this application, the details of construction being disclosed in the following views:

Figure 1 is a View partly in section and partly in front elevation of the complete machine; Fig. 2 is an end elevation, a portion being in section; Fig. 3 is a vertical section, enlarged, of the upper end ofthe packer head; Fig. dis a sectional view, enlarged, on the line 44 of Flg. 1;F1g. 5 1s a top plan view, also enlarged; Fig. 6 is an enlarged top plan view of the packer head; F1g. 7 1s a slde elevation of a acket showing the clamping latch, and Fig. 8 is a fragmentary view showing the latch in side elevation.

Referring to the details of the drawing, the numeral. 10 indicates a hollow pyramidal frame member, east in one piece, and forming a casing, or housing which forms a support, and at the same time a protection for l the important gears and other movable parts. Extending laterally from the upper portion of the casing or frame, are oppo sitely disposed brackets 11., 12, which are preferably east integral with the main frame 10. Each of said brackets bears an integral cylindrical vertical post 13, bored axially downward from the upper end to form a socket. Inserted in these sockets are gulde rods 14, upon which are slidably mounted suitable sleeves 15. Extending between these sleeves and integral therewlth 1s a horizontally d1sposed die ring frame 16, haw

ing a central opening in which is mounted,

a top die ring 17, removably secured to the frame by bolts 18. The upper ends of the sleeves 15 are counterbored to receive the lower ends of elongated protective caps 19 which serve to prevent grit from getting into the bearings of the sleeve. The frame 16 is moved on the guide rods 14 by means of pitman rods 20, attached at their upper.

ends to the inner sides of the sleeves 15, and extending downward and forward at an an gle, a suitable distance, wherethey are piv-l otally connected to rock arms 21, mounted on a rock shaft 22 journaled in bearings 23, supported on the brackets 11, 12.

and ring by means of a suitablecrank 2 1. Arranged upon the inner side of the brackets 11, 12, are blocks,forming supports for a lower die ring frame 25. This frame has a circular opening in which is removably mounted a die ring27 held in position on the frame 25 by bolts 26. The upper and under faces of the die rings 17, 27 are re- The shaft 22 is operated to shift the upper die frame spindle projects above the casing 10 and the 7 other end extends below the casing, when the said spindle is'in its initial or lowest posi, tion. The lower portion of said spindle is reduced to receive a sleeve 32, which extends approximately one-half the length of the spindle, and is provided upon one side with gear teeth 33 which form a rack extending the whole length of the sleeve. At the upper encLof the sleeve 32 is a loose collar 34 which frictionally engages a similar collar 36 secured to the spindle, 31, and corresponding collars are arranged at the lower end of the sleeve, and if desired, these collars may form ball-races for ball bearings to reduce the friction therebetween, the details of such arrangement not being shown, as it is a well known expedient. The upper end of the casing 10 is contracted, as shown at 37, to form a bearing for the hub 38, of a miter gear 39, a retaining collar 40 engaging the upper end of the hearing or box 37. The spindle 31 extends throughsaid gear 39 and is furnished with a key seat 41 which is =5 adapted to receive a key or feather (not shown) on said gear and thus permit the shaft to be moved axially without interfering with the rotary movement.

The gear 39 and spindle 31 are rotated by means of a second bevel gear 42 mounted on the end of a horizontal drive shaft 43, journaled in a bearing 44 cast on the bracket 11. If power is to be used for driving the machine, the outer end of the shaft 43 is supplied with a suitable pulley 45, shown in dotted outlines in Fig. 1. To make the device available for hand operation, a countershaft 46 is arranged above the drive shaft and connected with the latter by a suitable gear protected by a housing 49 and meshing with the gear 48 on the shaft 43, a crank 50 beingmounted upon the projecting end of the countershaft. When the said drive pulley 45 is employed, the counter shaft 46 is. removed to give clearance for the pulley. The upper end of the spindle 31 is reduced to, receive a packing head, comprising a circular plate 51(Fig. 3) having an annular depending flange 52 around the margin and furnished with a boss or hub 53 which rests upon the collar 40 when the spindle is in its lowest position, a suitable leather washer 54 being interposed between the engaging surfaces. Arranged at spaced intervals near the margin of the upper face of the plate 51 are packing members consisting of vertical blocks or shoes 55 having their rear ends semi-cylindrical and. their forward ends pointed as indicated at 56. These blocks or shoes are adjustably secured by bolts 57 which extend through suitable holes in the shoes and plate and are secured by nuts in the under side. of the. plates.

The spindle 31 and packing head 51 are moved longitudinally by mechanism concealed for the most part within the frame. Projecting partly across the interior of the casing is a horizontal bracket 58, in which is journaled a shaft 59 carrying a fixed pinion 60, arranged to engage the rack 33. The end of the said shaft 59 projects beyond its bearings in the bracket 58, and mounted upon its extremity is a worm gear 61 adapted to mesh with a worm 62, on a shaft 63, arranged at a right angle with the said shaft 59, and on a crumed at 71. The trunnions 65 permit the left hand end of the shaft 63 to drop sufficiently to throw the worm 62 out of mesh with the worm gear 61, and this may be considered its. initial or inoperative position, and the. purpose of the lever 7 0 is to elevate the left hand end of the shaft to throw the worm into gear. Provision is made for supplying an abundance of lubricating material to the worm by suspending an oil cup or tank 72 upon the shaft so. that the lower portion of the worm will run therein. The tank is semi-cylindrical in form and has oppositely disposed sleeves 73, through which the shaft runs, one of the sleeves having a rectangular projection 74 which engages a slot 7 5 in the casing wall, thus permitting the required rise and fall of the left-hand end of said shaft 63 to throw the worm in and out of gear with the wheel 61, but preventing rotation of the oil tank with the worm shaft.

Provision is made for locking the shaft 63 in operative position in the following manner: Arranged transversely to the shaft 63 is a pin 76 fixed in a bearing 77, and on this pin is mounted a loose sleeve 78 carrying a dog 7 9, having a tooth 80 adapted to engage the under side of the oil tank when the said dog is in a vertical position, as shown 1n Fig. 1.

Attached to the sleeve 78 is an arm 81, the free end of which extends into the path of a trip hook 82, secured. to the lower end of the rack sleeve 32, so that 'when the spindle 31 and sleeve are raised the said book will strike the end of the arm 81 thus carrying the dog back and allowing the left hand end of the shaft to fall and throw the worm out of gear. As soon. as

the arm 81 is released by the descent of the hook 82, the weight of said arm will tend to carry the dog back to its first position but cannot do this as the lowered oil cup is in the way. When the latter is again lifted, however, by pressing the lever 70, the weight of said arm 81 will throw the dog beneath the cup and when the foot lever is released the dog will hold the worm shaft in its highest position with the worm in mesh.

In Figs. 7 and 8, we have shown an improved means for fastening the co-apted margins of a modified form of the jacket 30. As shown, the jacket or mold consists of a cylinder 88 formed of sheet iron, open along one side to permit the mold to be expanded sufliciently to permit it to be removed from the molded article. To the opposite margins of the mold or jacket are secured plates 84, having marginal flanges 85. To one of these flanges is pivoted a lever or handle 86 to the side of which is attached a lug or finger 87 which is, adapted to engage the flange of the opposite plate when the lever is thrown forward, the flange which it.

engages having a raised beveled or inclined portion 88, which acts as a cam when engaged by the finger, and causes an effective binding or clamping action which holds the reinforced margins of the jacket firmly together.

The operation of our machine, described in a general way, is as follows :-The machine being at rest with the spindle head in its lowest position, and the worm shaft dropped so as to disengage the worm, the first step will be to raise the upper die ring, so as to permit the placing of the jacket 30 in position upon the lower die ring. This is done by operating the rock shaft 22 by means of the crank 24". and when the jacket is in place, the upper die ring is lowered until it engages the upper end of the said jacket. The required amount of plastic material is then poured into the jacket through the upper ring, a cylindrical hopper 89 being placed upon said ring to facilitate this procedure. When the jacket is charged, power is applied to the driving shaft by means of the crank 50, and thus imparting a rotary motion to the packing head, which forms a closure for the lower end of the jacket, and upon which the introduced material rests. This rotary movement carries the head in a direction the reverse of clockwise, and the action of the packing members will be to compress the material against the walls of the jacket or mold, the rapid movement causing an effective agitation of those portions of the charge which have not yet come under the influence of the rotating members. The operator now presses the foot lever to throw the worm into mesh with its gear, and causing the pinion which engages the rack sleeve to elevate the spindle 31 carrying the rotating packing head upward through the jacket the toes of the shoes being adjusted at a suitable angle to force the required amount of material centrifugally against the jacket walls thus forming a tube or pipe of the required diameter and thickness.

When the head has reached the limit of its upward travel, the trip hook 82 will engage the end of the arm 81 and disengage the dog 79 from the oil cup. This will permit the end of the swivclcd shaft 63 to drop by gravity throwing the worm out of gear and allowing the packing head to fall to its ini tial position, the worm 62 remaining out of. gear until the shaft is elevated again by means of the foot lever. The driving shaft is now stopped, the upper die ring raised by rocking the shaft until free from the jacket and the latter, with the formed tile, lifted from the lower die plate and conveyed to any suitable location, the jacket opened by releasing the latch and removed from the tile, and the empty jacket is then closed and locked and replaced in its seat upon the lower die plate, the upper plate lowered thereon in readiness for another charge of concrete.

Having thus described our invention, what we claim as new, is

1. In a tile molding machine, the combination with a frame, a mold on said frame, a drive shaft, a spindle adapted to be rotated and vertically reciprocated in said mold, a packing head mounted upon the upper end of said spindle, and operative connection between said shaft and the spindle, of a plurality of oval shaped packing shoes axially adjusted on said head, by bolts passing through said shoes and head.

2. In a tile molding machine, the combination with a frame, a mold rcmovably clamped on said frame, a drive shaft, a spindle mounted to rotate and reciprocate in said mold, and ope 'ativc connections between said shaft and the spindle whereby the latter may be driven by hand or motor, of a packing head carried on the upper end of said spindle, said head comprising a flanged circular plate, and packing members mounted on said plate at spaced intervals, said members consisting of oval shoes pointed at one end and semi-cylindrical at the other, and means for adjusting said shoes axially to vary their inclinations to the walls of said mold.

3. In a tile machine, the combination with a supporting frame, a drive shaft, a rotatable and slidable vertical spindle operatively connected with said shaft, a packing head mounted on said spindle, die rings removably mounted on said frame, of means for moving said spindle vertically, said means comprising a sleeve on the spindle, a rack on said sleeve, a pinion engaging said rack, a shaft for the said pinion, a worm gear on the pinion shaft, a worm adapted to engage said worm gear, a worm shaft, operative connection between the worm shaft and the drive shaft, and means for throwing the worm out of connection with said worm gear.

4. In a tile machine, the combination with a supporting frame, a drive shaft, a vertical spindle operatively connected with said shaft, and an adjustable packing head on the spindle, of a rae: sleeve mounted on said spindle, a pinion engaging said rack, a shaft for said pinion, a worm gear on the pinion shaft, a worm adapted to engage said gear, a worm shaft adapted to throw the worm into and out of mesh with the worm-gear, and operative connection between the worm shaft and the driving shaft.

5. In a tile machine, the combination with a hollow frame forming a casing, a vertical spindle arranged within the casing, a sleeve mounted on said spindle, a rack on said sleeve, a pinion engaging said rack, a shaft for the pinion, a worm gear on said shaft, a

drive shaftand said spindle, and means con-- nected with the drive shaft for operating said worm shaft.

In testimony whereof we afliX our signatures in the presence of two witnesses.

WILLIAM E. DUNN. HARRY E. DUNN.

Vitnesses:

M. A. MILORD, CHAS. F. Bassn'r'r.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, I). C. 

